Fuel supply device
a technology of fuel supply and injector, which is applied in the direction of fuel injection apparatus, machine/engine, charge feed system, etc., can solve the problems of damp pulsation, the sealing characteristic of the sealing member provided between the injector cup and the injector, and the inability of the injector cup to be attached to the bottom wall of the fuel pipe in some cases, so as to reduce the rigidity of the whole abutment region and restrain the displacement of the injector cup
Inactive Publication Date: 2016-11-17
TOYOTA JIDOSHA KK
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
This patent is about a fuel supply device for vehicles that prevents the displacement of an injector cup attached to a fuel pipe. The device includes a reinforcement bracket that strengthens the area between two parts of the fuel pipe, making it difficult for the part to deform. This prevents swelling of the pipe and maintains the proper function of the injector cup. The bracket also increases the rigidity of the entire region where the injector cup abuts with the fuel pipe, preventing the swelling of the pipe and further displacement of the injector cup. Overall, this device ensures the stability and reliability of the fuel supply system.
Problems solved by technology
Further, since the bracket is fixed to the bottom wall of the fuel pipe, the bottom wall is reinforced so that the bottom wall is hard to bend.
In the meantime, from structural restriction or the like of the internal combustion engine in which the fuel supply device is provided, the injector cup cannot be attached to the bottom wall of the fuel pipe in some cases.
In such a case, a relative position between the injector cup and the injector inserted into the injector cup is changed, which may cause such a situation that a sealing characteristic of a sealing member provided between the injector cup and the injector decreases.
Consequently, in a case where the fuel pressure inside the fuel pipe increases, the second side wall can deform so as to swell outward and can damp pulsation due to a pressure fluctuation of the fuel.
Method used
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[0027]The following describes one embodiment of a fuel supply device with reference to FIGS. 1 to 8. Note that, in the following description, directions such as an upper side, a lower side, and a lateral side are described on the basis of a state where the fuel supply device is attached to an internal combustion engine.
[0028]As illustrated in FIG. 1, a fuel supply device 1 includes: a fuel pipe 10 for leading, to an injector, fuel introduced therein; four injector cups 30a, 30b, 30c, 30d into which respective injectors are inserted in a fixed manner; and two brackets 40a, 40b for attaching the fuel pipe 10 to an internal combustion engine. In the present embodiment, the fuel pipe 10, the four injector cups 30a, 30b, 30c, 30d, and the two brackets 40a, 40b are made of an iron material.
[0029]As illustrated in FIGS. 1 and 2, the fuel pipe 10 is formed such that openings at both ends of a tubular member 11 having a generally rectangular-solid shape are closed by two caps 12, 13. The tub...
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A fuel pipe of a fuel supply device includes: a first side wall having a mounting surface to which an injector cup and a bracket are attached; and a second side wall to which the injector cup and the bracket are not attached. A peripheral wall of the injector cup extends at least from a position on a bottom-end side relative to a centerline in a mounting surface to a position on an upper-end side relative to the centerline, and is fixed to the mounting surface at a part of the mounting surface on the bottom-end side relative to the centerline and at a part thereof on the upper-end side relative to the centerline.
Description
INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2015-096618 filed on May 11, 2015 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to a fuel supply device.[0004]2. Description of Related Art[0005]Japanese Patent Application Publication No. 2011-132828 (JP 2011-132828 A) describes a fuel supply device including a fuel pipe having a damper function to damp a fluctuation of a fuel pressure of an internal space, a tubular injector cup (socket) into which an injector is inserted, and a bracket for attaching the fuel pipe to an internal combustion engine. In the fuel supply device, the injector cup is attached to a bottom wall of the fuel pipe so that a central axis of the injector cup is perpendicular to the bottom wall of the fuel pipe. Further, since the bracket is fixed to the bottom wall of the fuel pipe, the bottom wall is rei...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M63/02F02M55/02
CPCF02M63/028F02M2200/26F02M55/025F02M55/005F02M55/02F02M2200/856F02M2200/857
InventorHORII, YUYA
OwnerTOYOTA JIDOSHA KK